package com.atguigu.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.metadata.CellData;
import com.alibaba.excel.util.ConverterUtils;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import java.util.Map;

/**
 * @program: guli_parent
 * @description:
 * @author: xuejingjing
 * @create: 2020-10-05 15:47
 **/
public class SubjectExcelListener  extends AnalysisEventListener<SubjectData> {


    /**
     * 因为SubjectExcelListener不能交给Spring管理，需要自己new ,不能注入其他对象
     * 不能实现数据库操作
     * @param subjectData
     * @param analysisContext
     */
    public EduSubjectService subjectService;

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    public SubjectExcelListener() {
    }

    //一行一行读取excel内容
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if (subjectData == null) {
            //  throw new GuliException(20001,"文件数据为空");
            System.out.println("文件数据为空");
        }

        //一行一行读取，每次读取有两个值，第一个值一级分类，第二个值二级分类
        EduSubject existOneeduSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if (existOneeduSubject == null) {  //没有相同一级分类，进行添加
            existOneeduSubject = new EduSubject();
            existOneeduSubject.setParentId("0");
            existOneeduSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneeduSubject);
        }

        //获取一级分类id值
        String pid = existOneeduSubject.getId();

        //添加二级分类
        //判断二级分类是否重复
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
        if (existTwoSubject == null) {
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId("0");
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());//二级分类名称
            subjectService.save(existTwoSubject);

        }
    }



    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService EduSubjectService,String name){
        /**
         * select * from eduSubject where title =name and parent_id=0;
         */
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject oneSubject = EduSubjectService.getOne(wrapper);
        return oneSubject;

    }

    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService EduSubjectService,String name,String pid){
        /**
         * select * from eduSubject where title =name and parent_id=0;
         */
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject twoSubject = EduSubjectService.getOne(wrapper);
        return twoSubject;

    }



    //读取表头内容
    public void invokeHead(Map<Integer, CellData> headMap, AnalysisContext context) {
        this.invokeHeadMap(ConverterUtils.convertToStringMap(headMap, context), context);
    }

    //读取完成之后
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
